Let's not be too harsh on Pirlo though...
The man is almost 35, plays in the most vital position for the team, is required to run like hell and be active 90 mins every game.
Never got injured in Juventus, played more than 80 games in the last 2 years, plays every single game for Italy... Conte never rotated him before.
He just gets washed up. It's too much for him and it would be for any 35 yr old midfielder who dictates the team's play.
If Conte rotates him properly, letting him play only once a week, he will still be vital to this team.